apngopt(1)

💖 apngopt — the cutest little APNG glow-up tool (manual page, section 1) 💖

okay bestie, listen. apngopt is here to make your animated PNGs skinny. like, we're not changing how they look, we're just making the file size ✨behave✨. she's the apngopt(1) of the family, and she ate.

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✨ NAME ✨

apngopt — optimize animated PNG image files 🦋

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✨ SYNOPSIS ✨

apngopt [options] anim.png [anim_opt.png]

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✨ DESCRIPTION ✨

So here's the vibe. After you've converted an image into an APNG using, say, gif2apng(1), the file size can further be reduced with this utility. that's it. that's the whole job. diet time for your animation 💅

The Animated Portable Network Graphics (APNG) file format is an extension to the Portable Network Graphics (PNG) specification. It allows for animated PNG files that work similarly to animated GIF files, while retaining backward compatibility with non-animated PNG files and adding support for 8-bit transparency and 24-bit images. like, GIF walked so APNG could run, and then APNG also stayed friends with regular PNGs. main character behavior, fr fr 👑

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✨ OPTIONS ✨

• -z0 — zlib compression 🫧 (the classic, the OG)
• -z1 — 7zip compression 🔥 (default, no cap, this is what you get if you don't say otherwise)
• -z2 — zopfli compression 💀 (slow girl summer but she squeezes)
• -i## — number of iterations 🎀, default is -i15. so yeah, she runs the optimization loop 15 times by default unless you tell her to chill or to go harder.

ngl, if you just run it with no flags she picks -z1 and -i15 for you. she's got good taste. don't fight it 🤝

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✨ STANDARDS ✨

APNG Specification: https://wiki.mozilla.org/APNG_Specification 🌈

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✨ SEE ALSO ✨

apngopt(1) apng2gif(1) gif2apng(1) gifsicle(1) gifview(1) optipng(1) pngcheck(1) pngcrush(1) pnginfo(1) pngnq(1) pngquant(1)

(yes, apngopt(1) is in her own SEE ALSO. she's her own biggest fan. obsessed. 😌💖)

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✨ AUTHORS ✨

Program was written by Max Stepi <maxst@users.sourceforge.net> 🫶

This manual page was written by Jari Aalto <jari.aalto@cante.net>. Released under license GNU GPL version 2 or (at your option) any later version. For more information about license, visit <http://www.gnu.org/copyleft/gpl.html> ⭐

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and that's the whole page bestie!! this version of the apngopt manual page is serving pure apngopt(1), dated 2026-02-03, straight from the apngopt source, and she's iconic for it. go squash some frames, you got this 🌸🧚‍♀️💜